expanding metal (related rate)

A metal rod is in the shape of a right circular cylinder. As it is heated its length is changing at a rate off 0.2 mm/min and its radius is changing at a rate of 0.05 mm/min. How fast is the volume changing when the rod is 40cm long and 3 cm in diameter?

A metal rod is in the shape of a right circular cylinder. As it is heated its length is changing at a rate off 0.2 mm/min and its radius is changing at a rate of 0.05 mm/min. How fast is the volume changing when the rod is 40cm long and 3 cm in diameter?